Then taking it all the way down to the hardware, every user of x86 should be required to agree to a license agreement to use an x86 processor since it 'interprets' opcodes on-the-fly thus everything that uses x86 is under an intel license QED. I don't know the full details of the thesis theme but use an API doesn't constitute violation of the GPL v2 - see: tivo and thousands of routers, wireless cards, etc.